CVE-2019-15940 in PC530
Summary
by MITRE
Victure PC530 devices allow unauthenticated TELNET access as root.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 12/29/2023
The vulnerability identified as CVE-2019-15940 affects Victure PC530 surveillance devices that expose telnet services without proper authentication mechanisms. This represents a critical security flaw that allows any remote attacker to gain administrative access to the device with root privileges, effectively compromising the entire security posture of the surveillance system. The device fails to implement proper access controls for its telnet service, creating an attack vector that directly violates fundamental security principles of authentication and authorization. This vulnerability exists at the network service level where the device should enforce strong authentication before granting administrative access, but instead provides an open pathway for unauthorized users to assume complete control of the system. The implications extend beyond simple unauthorized access as this root-level compromise enables attackers to manipulate video feeds, modify system configurations, extract sensitive data, or use the device as a pivot point for further attacks within the network infrastructure.
From a technical perspective, the flaw manifests as an insecure default configuration where the telnet service operates without requiring credentials for root access. This configuration directly maps to CWE-312 (Sensitive Data Exposure) and CWE-287 (Improper Authentication) categories, representing fundamental failures in authentication mechanisms and credential handling. The vulnerability aligns with ATT&CK technique T1075 (Pass the Hash) and T1021.004 (SSH/Telnet) where adversaries can leverage unauthenticated services to establish persistent access. The device architecture appears to lack proper privilege separation, where the telnet service runs with elevated privileges by default, eliminating the need for proper authentication mechanisms. This design flaw creates a direct pathway for attackers to bypass all other security controls that might be in place, as the telnet service provides an immediate administrative interface without requiring any form of credential validation.
The operational impact of this vulnerability is severe and multifaceted, particularly for organizations relying on surveillance systems for security monitoring. An attacker who exploits this vulnerability can manipulate video recordings, disable security features, or even use the device to launch attacks against other networked systems. The compromise of a surveillance device represents a significant risk to privacy and security, as these devices often contain sensitive information about physical locations, personnel movements, and security perimeters. Organizations may face regulatory compliance violations under frameworks such as GDPR, HIPAA, or PCI DSS when surveillance systems are compromised through such vulnerabilities. The attack surface expands beyond the immediate device as compromised surveillance systems can serve as entry points for lateral movement within enterprise networks, potentially exposing other critical assets. The lack of authentication also means that any network traffic to the device can be exploited, making it particularly dangerous in environments where network segmentation is not properly implemented.
Mitigation strategies for CVE-2019-15940 should focus on immediate remediation actions combined with long-term security improvements. The most critical immediate step involves disabling or removing the telnet service from affected devices and replacing it with secure alternatives such as SSH that require proper authentication. Network administrators should implement firewall rules to block access to telnet ports from unauthorized networks and ensure that only trusted administrative systems can reach these services. Device configuration should be updated to enforce strong authentication mechanisms, including password policies that require complex credentials and regular credential rotation. Organizations should conduct comprehensive vulnerability assessments to identify other devices that may be running similar insecure services and apply the same remediation measures. The implementation of network monitoring solutions can help detect unauthorized access attempts to telnet services, providing early warning of potential exploitation attempts. Additionally, regular security audits should verify that default configurations are properly secured and that administrative services are not running with unnecessary privileges. These measures align with security frameworks such as NIST SP 800-53 controls for access control and system configuration management, ensuring that organizations meet regulatory requirements while maintaining robust security postures against similar vulnerabilities.